Truck-bolster.



S. A. BENNER.

TRUCK BOLSTER.

Patented May 1, 1917.

INVENTOR.

APPLICATiON FILED AUG-9.1913- RENEWED SEPT. l8, I916.

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UNTTED TATEE PATENT @FFTCE.

SAMUEL A. IBENNER, OF PITTSBURGH, IEENNSYTJVANIA.

TRUGK-BOLSTER.

Application filed August 9, 1913, Serial No. 783,882. Renewed September 18, 1916.

To all whom it may concern:

Be it known that I, SAMUEL A. BENNER, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Truck Bolsters; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to improvement in car parts and is particularly, though not exclusively, concerned with improvements in the construction of the body of the truck bolster. The object of the invention is the production of a truck bolster having great strength to sustain the excessive weight of the heavy cars now in common use, and at the same time to secure lightness of construction, so that theweight upon the wheels of the car will not be materially increased and finally to produce a bolster possessing the above qualifications which may be manufactured. with the greatest economy.

With these objects in view the invention consists in a construction and arrangement of parts a preferred embodiment of which is illustrated in the accompanying drawing, in which Figure 1 is a perspective view of a section or blank from which the bolster is constructed. Fig. 2 is a side elevation of the bolster body complete; Fig. 3 is a vertical section taken longitudinally of the bolster body; Fig. 4 is an end elevation of the completed bolster body; and Fig.5 is a transverse section on the line 55 Fig. 2.

The first step in the production of my improved bolster consists in the rolling of a section or blank 1, as shown in Fig. 1. This section, which may be readily rolled in a manner well known to those familiar with the art of metal rolling, consists of the two upwardly extending channel members 22, which are joined by a web 3. From the lower side of this web and offset from the inner flanges 4 of the upper channel members are the depending flanges 5, 5 forming a downwardly extending channel member of which the web 3 forms the base. The rolled strip of the character described is then cut into sections of a length suitable for the proposed bolster. This section is then placed in a suitable shearing press by which the downwardly extending channel section formed by the web 3 and the flanges 5, 5, is sheared off from the body of the bolster section between the points 6, 6, Fig. 2

Specification of Letters Patent.

Patented May 1, 1917.

Serial No. 120,883.

and this channel portion is bent downwardly to form a tension member 7. Durlng the shearing and bending down operation the upper or pressure members of the bolster body formed by the upwardly extending channels 2, 2, may be held against bending or distortion in any suitable manner, and if desired the ends of the bolster body may be clamped so that in the bending down of the tension member 7 the metal of said tension member may be stretched as well as bent. When the bolster body is brought to the proper shape, as shown in Fig. 2, by such bending and stretching, the pressure members and the depending tension member may be reinforced and secured together by short struts 8, 8, or other sultable construction rolled, cast or forged, riveted both to the pressure members and tension member, as shown. The bolster body may then be suitably bored and provided with the usual equipment of center plate and side bearing plates, as desired.

In some instances, it may be desirable instead of stretching the tension member 7 as above described, to merely bend the same to shape, in such case the section or blank from which the bolster body is to be formed may be of greater length than the length of the completed body, and in the bending op eration the extremities of the body will be drawn somewhat together so that the pressure members formed by, the channel members 2, 2, will be either spread apart or drawn together somewhat at the center and possibly said pressure members may be somewhat bowed upward at the center. In such case, however, the struts 8, 8, when in position will securely hold the pressure members and tension member rigidly together, and in proper relative position. If desired'the ends of the bolster may be re duced by shearing the flanges of the tension member either along the lines a or b and also the flanges of the pressure members along the line 0.

From the above description, it will be seen that the completed truck bolster consists of the pair of pressure members of channel form by which great strength in the pressure factor of the bolster is secured and the tension member 7 is also of channel form the side walls or flanges of the channel extending downwardly and therefore imparting the greatest possible tensile strength and resistance to tension stress on the bolster.

It is obvious that this construction may be employed in other relations, as for example a car sill, but its principal utility will be secured in its employment as a truck bolster where it is peculiarly adapted to resist the strains and stresses to which such bolsters are ordinarily subjected.

While I have herein shown and described a particular embodiment of the invention, it is to be understood that the same may be altered in details and in the arrangement of parts within the scope of the appended claims.

What I claim is:

1. A truck bolster formed of a rolled section having pressure members formed of parallel upwardly opening channel portions, of a tension member formed of a channel member intermediate said pressure members, said tension member being sheared from and bent downwardly intermediate the ends of said section. I

2. A track bolster formed of a section of rolled metal having pressure members consisting of channel portions extending along each side of the body of the bolster and a tension member formed of a downwardly extending channel member rolled intermediate of said pressure member, said tension member being sheared from the rolled section intermediate of the ends thereof and .bent downwardly to form a truss member.

3. A truck bolster formed from a single rolled section comprising upwardly opening channel members extending longitudinally of each side of said section and a downwardly opening channel member extending longitudinally intermediate of said pressure members, said tension member being sheared from the body of the section intermediate the ends thereof and intermediate said pressure members, and bent downwardly to form a truss member.

4. A truck bolster formed from a rolled section comprising upwardly disposed channel members extending along the longitudinal sides of said section, and a downwardly disposed channel portion extending longitudinally intermediate of said upwardly disposed channel members, said downwardly disposed channel member being sheared from the body of the section intermediate the ends thereof and bent downwardly to form a tension member.

5. A truck bolster formed of a rolled section having pressure members formed of parallel upwardly extending channel pieces, of a tension member formed of a channel member intermediate said pressure member, said tension member being sheared from and bent downwardly intermediate the ends of said sections and a strengthening member interposed between said pressure and tension members adjacent the center of the bolster body.

6. A truck bolster formed of a rolled section having pressure members formed of parallel upwardly extending channel pieces, of a tension member formed of a channel member intermediate said pressure member, said tension member being sheared from and bent downwardly intermediate the ends of said sections, and parallel strengthening members spaced apart and extending between the central portions of said pressure and tension members.

7. A blank for a car part consisting of a rolled section comprising a base plate or strip having upwardly disposed channels along the longitudinal edges thereof and having a downwardly disposed channel intermediate of said first named channels.

8. A rolled blank for a car part comprisingparallel upwardly disposed channel members extending along opposite longitudinal edges of said section and a down-,

wardly disposed channel member extending parallel with and intermediate of the first named channel members.

9., A rolled blank for a car part comprising parallel upwardly disposed channel members extending along opposite longitudinal edges of said section and a downwardly disposed channel member extending parallel with the first-named channel members.

In testimony whereof I, the said SAMUEL A. BENNER, have hereunto set my hand.

SAMUEL A. BENNER.

Witnesses:

J. GARFIELD HoUsToN, JOHN F. WILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

